During the past few years, two attempts at usable methods of classification of archaeological cultures have been made. One is by Harold S. Gladwin, of Gila Pueblo, Globe, Arizona; the other was worked out by a group of students at the instigation of W. C. McKern, Milwaukee Public Museum, Milwaukee, Wisconsin. The present paper does not propose a different form of classification, but is a suggestion for applying the McKern system to local (Oklahoma) conditions.